Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ed6d349050411a4b1119a61faedc382a0f34718f0e0e70f81aba7c43dd6c4f' 
  AND token = 'be+tpPZzIvVcrjei50NW63U7odm6YR9GpeJATWZKMCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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