Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e2af7f9b32dbeb7e19c866f3d490b2d3989a1b2cace9e1739803c07744f289e' 
  AND token = 'V+yZZQK8ogEOqa5V79tKRJK5GDyZIpOOUtesUttalKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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