Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dc65a00abcebda1714b0f0ffa46b82ca7089d5170a9f6498698b853cbc16082' 
  AND token = 'JJI7e37qiN+TLbVgm7PTCKAqaFCimZ3Mhx3iqILJijg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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