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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17924af75406a08f61c8290da68c56eb1d0d0fcb441805ef97dcb209471817f3' 
  AND token = 'Z22Ym6Ram2I9Al7byWhJUS2QIoCuNLQZ7FBtYenSle8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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