Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24c78f553eee453d0a9bafe4a0095a53722df2ce7f77b0802f1f4992c02ffdd1' 
  AND token = 'LNBeSNjuDwWElkt8BHXFHpJbJxcHJ2SGXJisWuff/2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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