Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ebaf8fb0142416e3b0cf3a8f2b8083aecc384bbc38f965ae20b5e9c72003c9' 
  AND token = 'LgKbbikAol8vtLadSPs1vR6jW4vHdxwRKYiulPc2uoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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