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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f556cbd57d5bda0b99a47d596f0ba0ea0a648bef08e8e67de10e7b619a011da' 
  AND token = 'oAhxSN6KVdNhXl90SXBXC7HiGkhEnf1jIX0GLjSf0CA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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