Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ccb53bb9d715ee78350934f0cefb7c800bd723ecabb3cf8607b3333df71411f' 
  AND token = 'Dd0NUlLNMUQXJ6g5LEgFjUrIDIVbtRGvU9Atgco91rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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