Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c7155bcce47df7c7aca30fa42fbb7d703a3828706d6ad371fef041ec9ed0e8' 
  AND token = 'GBFxstbvW9sDxYuRrZ5KDZUPA2/ctr17I/15U7Fox7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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