Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f86e85d8d0adc7bf619a1be06ac9c120af41a69e74af208e523174115d749c7' 
  AND token = 'M3mAs21GRviY8yX5uBOB44wVY3s46vGRRT2jFF79lTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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