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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8c6c0987dcb92841a6a73d2ced57c9df341d4334916d98f2d1c544196728477' 
  AND token = 'HdNYlMkFjmMWCDrlWpGRW+1FPJ4+TYb2sIyy0GR0dyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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