Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a8b292a9d51cde83ee9e9ea7eeb3aed56cab2b7a30972d3de13d1960f0d32d7' 
  AND token = 'U7GTo0M+QGIZtvX55Dg946BibaySAIZAzREzXG0pDqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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