Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c202de7205c6fb253fdf394eeb85de9604327ab1cf481dbb06d1248ff140ce31' 
  AND token = 'CtfjirI6n+gMpsiPLaEheIUkXVHazhdD1vOiJegTbE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}