Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bb9182f55b641fa662f1156fe582ce879a5642f454bac7e42d672e4b585b6df' 
  AND token = 'wC3B8QOUioI4ty83yhURB7X/WvDoyFvCFPvEat5M5C4=' 
  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"
    }
  }
}