SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09bd6f8b252d7842c09577cf97150febf67fc461461f45c23bdf6c6d377ef02a' 
  AND token = 'KbSUGUjU/W0vwVmzlPSCy9mUWdZp28TlsIwkBcgHk0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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