SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf95e822c621bce7d4b547c07140b7d2de05fb5f398b3b8daea469a8b9734662' 
  AND token = 'GEQgReyVtaQZjQbQX5YGltAF7+lBI2qfEEnWDu6BzEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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