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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cca0417d5e812550f0963d4b7ef551aa788bdb40168e3a4b3c77c7d0da00451a' 
  AND token = 'OlVH413vlqeW9Ef+m4JMfwGkaKqkMiajw9HzryDZ3WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}