Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a73aa16b49394857e776de516b3e505d372f274f82e104b110445731cd64038' 
  AND token = 'G2Gr0ynTc9S4ckm4/5cR1tusaPA3Q45vYbs+ZQqjEFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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