Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab40a552f30f5e998b71a1a022b75cf3d20009faa1034a6694e6125f0f379410' 
  AND token = 'Vyh2+xlBc+WDmf8uV5F8idJw4rZw/Atm/0Um75F5N+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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