Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '286193d1b2ac7fe1c38afd4d3009ca4dca4780f24d4e040edb499838644d6126' 
  AND token = 'pu+6UsjuVi/K83uNLh5Qw/stlcE/fS4GYg4gNXCbfhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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