Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6516abddadd15fbdea733af1ec4059b72fe1f9e74b705de9a2ac10e8df0f3e76' 
  AND token = 'Xidm8/5oRz8nQGfqOU2U3bi8I1WI7IuMV2ND6TcdJog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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