Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a3a877d28bbf9f5d94f21d547d4cf4b13ca842cb6a36f4e507c746ca7444bbd9' 
  AND token = 'KbEKmyt3OULuQpILlum/6Fa5CKmvMzQ3gY4zhirdWbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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