Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a63e7558b7e452024c3955501c283efe0f683633c5413298c32d4ae4f84b6fb' 
  AND token = 'QKIRxJSGQ9pjq3SHp6CcW7tCT8KDEy+tcdeLll1tBzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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