Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87cdcc74fe8416d11d0a88b38118c20285c621798d5572ff23a698cc058bde51' 
  AND token = 'V86lVYK2YLTouLOOD89rh2oGu5+HmQ0qWKWtQZCo6YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}