Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a19dc410d75404f4fa6d6e842e6326298925c918dff534634431720e900a39b3' 
  AND token = 'rhp9iN+rU4VER1AkI703aPYLVB1uMR4m6w7XewR1Xck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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