Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6d6217745f5c2ba49518c0b2b6a361f6930ea8aedb13b5cb8294cb79be5cbbd7' 
  AND token = 'AyZdORxwO5QYXoGG4MPbDlp9StmosOWFBFkeahKI8X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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