Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0fae20aef9e90bf48e8535d865db16af651ef03a5a84e9dab6f0ae56a0eecbde' 
  AND token = 'BkGlyZpvI3Kclgmd1UzlxwY64967f0b0cUXNgdPotIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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