Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edc53a4c7a005551a4722bbd4e21c67563507ab3f0084401b9025148a772c7d2' 
  AND token = 'aBaeqPXv2B0SC+YAPt3t7jEoUJi4hHUmAsZjf1wGzbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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