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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4528f60f9e2c76f109c5e0a51dbea96d1da14e6561698d4ad6f74abf4ba48b36' 
  AND token = 'coGvP4+6thpGWt68bUGsnxiNDPzriMejxJJgwgJJlwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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