Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '103ce56daef4e9086c8ae24e8c672b523790a6c90ac7b2aaa64f32eb2ad7501c' 
  AND token = 'N65O98UW2hSJnDXVGEi/bovuqjPViqi+ZDSBFN+o4AQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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