Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7905fd03d530fd51aa5ed64c6af1675ada19330ed280e075659e5c089877d99f' 
  AND token = '3Nj3Ld01EApB4H127Je3OLWEUtUHWKJGb2jUFdN5L6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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