Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b8e74ac4d15235beec2616f8d1d85017b4ef74f168c3a4603bf801d767119fb' 
  AND token = 'mkBtKl7DamWSlfkDXbUfU4Xy/yawCftd1hc0mW0/Arg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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