Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7637ee3446a62c23611f641caa65cbbae2643d98419603d684ac172dd2522a6' 
  AND token = 'BlCBcAV4gFN8HD0hHcM2Jhg4gmzg+IKSAGqIPQBowys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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