Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3bf1c2a97e9a3ff5401d30114eae1a622af5acc096365d1e408f96ca9730f81' 
  AND token = 'J4EX3U5OExhp9VGfNDSlcXREYGJuCUYVhoiLHA+vyDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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