SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0a5ec47384f3ab8f86fdf63827d1f30af858474bd0808e3629bb112c65d6bfcc' 
  AND token = 'J2eryobVc4foKCPoDLGX/11EgyNvIMORoHHpDncFBw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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