Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0634ecf586d72794e23cf38e4cc864381eeb887371b34b83c91ff376e4fe5a8' 
  AND token = '9WXOsbohdvguOtLH4FMLfjFXBEYQIWWXo1j2gTE9xkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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