Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5293ddcec682192e839ec8019dd71377a656d8e0489f30fdccc8e76411171001' 
  AND token = 'rh514rjXBaqaMeBNTdrMD7Imzb5fUyoP8++rDrtlPBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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