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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '713addb731986ef3ccaae7b9e8ba8fa8d6d00f09e848425edf7cab20a46d1a6d' 
  AND token = 'fqp9J3yJpuIqrhSPYI7i4n0ZEzjhGbhJyZzK7W2IZGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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