SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d48f9cad3ecb2369f86dc393d62d1aefa71a80e1998c072f50fa94fcf277516' 
  AND token = 'xlzEMsZLeNAEZK7QKG8LwM1JBXLSRJPy5dGwzZBPmwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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