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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e89a9a0f44879533c941dfc2219b445ab2799cd158f3ce98f2924fc550b212c' 
  AND token = 'BA8XAWWk4tGEa4SBMqdD760VuFNE1ZN8XHbefPolFQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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