Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8e2bab88b1591eadff7f8b1f38d2420b0c9947a5a662c896534c0b1fbee6568' 
  AND token = 'h82GY3W2N7hU1xEDUgcLZ3dkgSPMs6FbeLFDWcH3yLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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