Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3e35fdd6631a4f10eb31f50b7d827efb906f3091633a097855802bde90e10ac' 
  AND token = 'rwLsJuZjW6wRtvLodArMZi8WZbXRomqfVQxaZ2g12YU=' 
  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"
    }
  }
}