Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '500f09fbc55f6ad833474f481338772a1082a95a70eefbd8bbbaca27cf644da8' 
  AND token = 'uh1g4klysCrS8U7GAnvKF+Uk0bLNSm17KWKZ+oTHsDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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