Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8788bb64fc82f834477eb9cbfcbcf9774656cd89fa55aa86c272475aaa3d4ad' 
  AND token = '4RV89zuKiWNrYWrwQNPwOPV6W1q9Ee4fZW6B0/xwxeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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