Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07e4e23defe0293be60adb59d20546d8e3a9657c642f45bd1feaf36eacbcead' 
  AND token = 'kUEh3UnbG5+2djSnrcoCwYIljXh+ifurfRKKgD7Ih0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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