Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7583362e2ee9c3f9d7571ca0af44a58be9bbc0f9bccccdad9ac3d3a22b2bd85a' 
  AND token = 'x37jsaereWL3Mdoi7cRNH+tOidZU7r6rLgTWWwP/4Vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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