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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6888f9d0b794493cfbb6b52cd7016180ba77cd962262442688dce0f323c62f9e' 
  AND token = '0C/s01tieRaXccUInUV50ptwtGJDke0WPI/k1tFBdAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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