Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d00746ef884e79bc8be971179bdc8507d8193fc4e5dfba111dca3237a9c5bd5' 
  AND token = 'yN6W4CzHS4vdZIQF3H4EGH+vLvDyfS2pT5ssqzisVA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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