Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3f1a6ba9dffc87f7a3b4d5ac88d93531ea853ea5c80b8de8d43b7e530cc09ed' 
  AND token = 'KBf1dQaqk9Nvt2W7a9PRCUQ68VCCPJxLrzcquWkwULQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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