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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bb6c8270aa8b04a631c2768cfc022fae53673e3311f664b71be2ac1188c2fec' 
  AND token = '7QV1pSt3c9/3tgEitnqcj9cON/UkKonzkfZ9q3TwuNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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