Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f56dcfbe4ffb2fa1006550b41f536337be55db14b5fafd326ed337d4718b1da' 
  AND token = '+azJWRSbDjiHhAir8w9ho9zVvwk4xkTSPitOOZeWcAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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