Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa8aee06d3b5f4e009006b933bc8e791ac0f24a800b24995580ce17a3ab65b3' 
  AND token = 'dI1zFlf3IVnJaGxEvfx+Ln745iD85kEbqtGkY82XgTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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