Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc5505bd1ef00490e6632f7641d240936012c18ea84c8d849b0f3e5a301184e2' 
  AND token = 'epc2oHisLxXVQ2HAi3KZoSB2FJDCzRq3s2jEQsUZyY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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