Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2c1712bd85308dbb0e02313b6e155e9a62006323debefac94f1d98ffc4a2356' 
  AND token = 'yEQLM88qli1VoGJh1ccU4Y5uYzPiu7PxfQvVSbK18F4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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