Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29ab6bc02d1b416a252ffc02c04aa30cafb35123763afb4208e8305c87fed1a0' 
  AND token = 'leAg1WKPQ1q0VkOQh2fPw2LsAXbWd+xjnToZD+tyb6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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