Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53aaebd3ac6b8c1930af22859df7bc9747095542362b0a1c7212f2464ac0ede5' 
  AND token = 'kWi2Iuhnlg8QiUupmipMYeNzg2CWOiY04zV+8/Jx9gc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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