Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9973665fe18806867f787b48c1cc64b08c2d111654a3b78ea2ea81e1982819f' 
  AND token = 'zTwh9IvUTgmL4XCmDt20xZ112gM820dnpYXFciM8poo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}