SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97370c9006fb06919aebde4bc369dc23c7a2bedc1c33ca630e15c19d8681359e' 
  AND token = 'Q1HTOKg+zM/RumgGqb04i+hZlqJ/fMpd4hyxHKlInUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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