Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f801ddeb8826d2e29e31fb7f676b895f3bbff6acafec4103cec86047e0f23b' 
  AND token = 'rB2C+IMKE0H1+ea3fFE/ob6PTaCx4DGtlp6FaKbXSYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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