Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4788074e3d183c91645eeee947223cd77931532b3e397eb333620c6f23e2225' 
  AND token = 'tu8yY+r/rCTOuCbF/r0fDozHOyvOxaK1cCaCoJuxXJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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