Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f06a454546be172e59c233b1ce9d05dfb1b0ae1e980cc1a353f1102ecef7906f' 
  AND token = 'wmvvDCyLILpxgiND6GxYyQHroeFr56IjlRLEd7AQXQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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