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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee13ae19a122d7b42e08aa3745cfea6197647d8eb7ca12d8e2bad75457c38d39' 
  AND token = 'lUurg2Os7/Gb8JA9Yw0J+Y+O+T0i1EOCmhLi9332KAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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