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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd829435ae2c3c1a1276604f290da2c908199dac1543dbe3fce416eb78a538ce' 
  AND token = 'QfaY7tJmnSAVTgxFlHCxRV0NMP738ACc1psc9HZ1Bsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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