Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf3b40257bce2d52a527f1f283eecf2ee35bfc12436d4584e36cd2abcfbe90cb' 
  AND token = '8MAS9jCK1iEBEkppcQuDxyFF5hCUP5wtGVljWyJYnz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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