SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '936ef783fc61d3c9a129f94125bec5c2f3662b0240c786782c245428fc923ff2' 
  AND token = 'Gu4+FI70Pj6W4yAwcP/hxaRV1paMIS5QQ5gq/Y/mgRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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