Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c7b10528bc5512aba0c821d37625331fe3d54fa3ffe67a8607808930d9e58be' 
  AND token = 'nyIjRj77ZZ4wF4+YXfAajinC+Q3gjFOx5NpJ0NySVqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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