Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cb63f87bfd1b8791d4deec19aec14106dde0fbebaad6779fa43e70a8a1694a4' 
  AND token = '0Gxja3I40S7IdWtBeZTJ/KPlaXIQA69eZR71V2konAU=' 
  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"
    }
  }
}